Preheat oven to 350 degrees F. Coat 9x13 baking dish with non-stick cooking spray.
Place a large skillet on the stovetop over high heat. When the pan is very hot, add the beef and season with salt, pepper, cumin, mustard powder, and paprika. Add the onion and garlic, and cook, stirring occasionally, until beef is browned and onions are golden. Stir in drained tomatoes until well combined.

Place bottom half of buns in prepared pan. Top with beef & sliced cheese. Finish off with the top half of the bun.
Mix all the ingredients for the glaze in a sauce pan over medium heat until melted, smooth and combined. Pour over the buns.
Bake at 350 degrees F for 25 minutes.